Sheet-metal structural element.



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91 7,082. Patented Apr. 6, 1909.

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PAUL KUHNE, OF NEW YORK, N. Y.

SHEET-METAL STRUCTURAL ELEMENT.

Patented April 6, 1909 Application filed March 1, 1907, Serial No. 360,092. Renewed January 15, 1909. Serial No. 472,560.

To all whom it may concern:

Be it known that I, PAI-L Ki'JHNE, a citizen of the United-States, residing in New York, in the borough of Brooklyn, county of Kings, and State of New York, have invented certain new and useful Improvements in Sheet- Metal Structural Elements, of which the following is a specification.

This invention relates to an improved sheet-metal structural element for building purposes and is intended to be used in walls,

floors, and partitions forholding the concrete or other body firmly in position; and the invention relates more specifically to an improvement on the sheet-metal structural element for which Letters Patent were granted to me on January 1, 1901,, No. 665,117, so that it possesses increasedstrength and in creased capacity for holding the concrete or plaster-in position.

In manufacturing the sheet-metal structural element shown in the patent referred to, it was found that the machine by which the cutting of the slits and opening out of the structural element was produced could not form the angles ,between the flat faceportions and inclined portions accurately enough, but that they became slightly buckled or rounded oil transversely in its dhl'erent )ortions, so that not only the ca pacity of olding the concrete or other body which was spread over both sides of the structural element was impaired, but also the appearance of the same rendered less attractive.

The object of this invention is to overcome the objections experienced in the manufacture of my improved structural element by means of a comparatively simple and eilective improvement; and for this purpose the invention consists in the novel construction to be hereinafter described and claimed.

In the accompanying drawings, Figure 1 represents a pers ective view of a sheetmetal structural e ement embodying my invention, Fig. 2 is a horizontal section of a wall construction showing the sheet-metal structural element embedded in the concrete body, and Fig. 3 is a vertical transverse section on line 3, 3, Fig. 1.

Similarreference characters indicate corresponding parts.

Referring to the drawings, A represents a piece of my improved sh eet-metal structural element, the blank of which is cut by means of a suitably-conformed pair of rolls into parand that extend in parallel rows diagonally.

across the body A. The open meshes d are so made that the parallel face-portions a are formed which are connected by the inclined portions, one row of faceportions and inclinedportions being ofiset with the adjacent rows of inclined portions. Each open portion or mesh (1 is formed by means of two face-portions a, a, both of one row, and by two inclined connecting-portions b, b, one being in the same row with the pair of faceportions (1 and the other in the same row with a pair of adjacent alternating face-port1ons a. As shown in Hg. 2, the alternating inclined connectingortions b cross each other sidewise, when t .e body A is in side-elevation, so

that any two of the so crossing inclined con. necting-portmn's form a trusswith the face- The face-portions a, instead-of being flat,

as heretofore, are provided with longitudinal corrugations e by which they are strengthcned and by which their capacity for receiv ing and holding the concrete body is increased. The main-point, however, is that by the corrugations on the face-portions, the entire structural element is strengthened at each side and thereby the irregular buckling of'thc parts prevented and a more evenlyshapcd element obtained. ,As the concrete is applied to the structural element first on one side and then on the other, the corru gated face-portions at one side carry the body of concrete applied to 0ne s1de, while the corrugated paral lfaceportlons on the other side carry the body of concrete applied t0 the other side of the structural element, in

connection with the inclined connecting-portions and the open meshes of the-element.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

A structural element for partitions, walls and floors of buildings,'consisting of a sheetcessive face-portions, said face-portions be-- 13 metal plate composed of a series of similar ing provided with longitudinal corrugations; longitudinal stri s arranged side by side, in testimony, that 1 claim the foregoing as adjoining strips eing offset with respect to my invention, I have signed my name in one another and integrally connected with presence of two subscribin witnesses.

each other at a pluralit of points, said strips I P UL KUHNE. consistin ofaseriesof aceortions arranged Witnesses: v

alternate y in two paralle planes and int PAUL GoEPEL,

clined portions connecting the edges of suc- HENRY J. SUHRBIER. 

